Sand-washing device



E. SHAW.

SAND WASHING DEVICE. APPLECATION min JAN. 12, 1921.

Patented Feb. 14, 1922.

IN VENTOR EDMUND SHAW nan ' CA ML A TTORNE Y E. SHAW.

SAND WASHING DEVICE.

APPLICATION FILED JAN. 12. um.

Patented Feb. 14, 1922 2 SHEETS-SHEET 2.

M/l/ENTOP. EDMUND SHA w.

A 7'7'OPNE' Y ////i ll I! llll unrrsn STATES Parser QFFICE.

nmvmivzo SHAW, or EL PASO, TEXAS, ASSIGNQR TO THE ALLEN GONE 00., or E1.PASO, Texas, A CORPORATION or new MEXICO.

V SAND-WASHING DEVICE.

, Specification of Letters Patent. Patented Feb, 14 1922;

Application filed .Tanpary 12, 1921. Serial No. {236,666.

To all whom it may concern:

{Be it known that I, EDMUND SHAW, a citizen of the United States,residin at El Paso, in the county of El Paso and tate of Texas, haveinvented new and useful Improvements in sand washing Dev1ces, of whichthe following is a specification.

This invention relates to sand washing devices of the type employing ahydraulic elevator. V

The object of the invention is to simplify and improve the constructionand operation of a device of this character.

Inthe accompanying drawings Fig. 1 shows a; vertical, central sectionalview of one form of device embodying my invention, Fig. 2 shows a plansectional view of the same,

Fig; 3 shows an enlarged vertical, central, sectional view of the jetnozzle and adjustable mounting therefor employed in connection with thehydraulic elevator,

Fig. 4; shows a vertical, central, sectional view of a modified form ofthe device illustrated in Fig. 1, a

Fig. 5 shows a similar view of a second modification.

Referring in detail to the accompanying drawings, the device thereinshown comprises'a tank 10 for receiving the material to be treated, suchmaterial being fed into the tank through a feed pipe 11. Beneath thetank 10 is a compartment 12 communieating with the interior of the tankthrough a series of orifices 13, the area of which orifices iscontrolled-by plugs 14, whereby to compensate for changes in thecharacter or volume of the feed stream. Extending vertically at thecenter of the tank is a discharge column or hydraulic elevator 15 havingan intake or throat piece 16 extending into the compartment 12.

To supply water to the hydraulic elevator I provide a pipe 17 controlledby a valve 18 and having a discharge nozzle 19 disposed within thecompartment 12 in line with and below the throat or intake 16 of thehydraulicelevator. T 0 allow the distance between the nozzle 19 andintake 16 to be varied I mount the said nozzle in a screw threadedbearing 20 arranged on the bottom of the compartment 12. The nozzleconnects with the pipe 17 bymeans of a flared or conical end 21 enteringa chamber 22 on the end of the pipe 17.

An auxiliary supply of water is admitted to the compartment 12 through apipe 23 controlled by a valve 2 1.

In Fig. 1 I show the compartment 12 inside of the tank 10 and materialfrom the latter is admitted through orifices 13 formed j compaitment'12which incloses the Space around the nozzle 19 and intake 16.

In the operation o1 the device the tank 10 is supplied with sand andwater through the feed pipe 11 and-the sand or solids ac cumulate in thetank near the bottom thereof while lighter particles overflow through aspout 10 at the top of the-tank. The material accumulated in the bottomof the tank enters the compartment 12 through the oriiioes 13, and ifsuch material should enter too fast these orifices maybe partiallyclosedby means of the plugs 14. Within the compartment 12 .the material meetswith clear water admitted through the pipe 23 andis drawn up through thethroat of the discharge pipe 15 by the jet emitted through the nozzle19. throat 16 the sand is scrubbed and freed from adhering clay. Thecolumn 15 disln its passage through the.

charges outside of the tank 10 where-the sand is allowed to pile up onthe ground or otherwise dewatered by suitable means. The water flowingaway from the pile of sand carries the clay with it so that the sand iSieit clean.

The means by which the area of the orifices between the tank 10 andcompartment 12 may be varied is an important factor in a device of thischaracter. 'For example,

if the feed be mixed sand and slime, the slime overflowing the tank 10and the sand passing through the compartment 12 it is evident that thearea of the orifices must be sufficient to pass all of the sand since ifthese orifices be too small the sand will accumulate in the tank andeventually overflow with the slime. On the other hand, if theorifices betoo large the slime will pass into the compartment 12 along with thesand. It is also to be noted that the area of these orifices can bechanged without interfering with the functioning of the device byemploying the rods 14: terminating at the exterior of the tank.

Another feature of importance in connection with the present device isthe use of an auxiliary stream of water supplied to the compartment 12by the pipe 23. In prior devices using hydraulic elevators the wholesuction force of the hydraulic elevator is effective on the orificeformed in the partition between the upper and lower compartments. Sinceall the material elevated must enter the lower compartment through theseorifices there is always a downward flow and any particles in the uppercompartment that come into the zone in which the suction of thehydraulic elevator causes a downward flow must inevitably pass throughand be discharged by the hydraulic elevator. To overcome this I providean auxiliary supply of water which is just sufficient to neutralize thesuction eilect of the hydraulic elevator. While the sand from the tank10 will still pass downwardly through the orifices the force of downwardmovement will simply be that of gravity. Furthermore the auxiliary watersupply will create an upward flowing current through the orifices 13since all water entering the compartment 12 from the auxiliary supplypipe 23 in excess of that discharged by the hydraulic elevator must passthrough these orifices. Thereby these orifices are converted into asorting column which will act to prevent the downward passage of slimeor finer particles than are desired in the hydraulic elevator discharge.In effect this auxiliary supply of water converts a very inefficientclassifier into a perfect sand washing device. 1

"To obtain the highest efiiciency from the hydraulic elevator the outletof the nozzle 19 must be properly spaced with relation to the throatplece 16 and this spacing depends on numerous factors such as thevelocity head of the flow from the nozzle, the charac ter of thematerial to be raised and the shape or curvature of the inside of thethroatpiece 16, which in the present instance is fashioned after aVenturi tube. This adjustment should be made without interferi-ng withthe operation of the device vice as herein shown and describedlnay beand it will be noted that the present screw threaded mounting permitssuch adjustment from the exterior of the machine.

Various changes in the construction and arrangement of the several partsof the deemployed without departing from the spirit of my invention asdisclosed in the appended claims. I

Having thus described my invention, what Iclaim and desire to securebyLetters Patent is 1. In a sand washing device a receiving vessel, acompartment communicating with the bottom of said vessel into which thematerial accumulated in the bottom of said vessel passes, a dischargepipe opening into said compartment and extending upwardly to a pointabove the level of the receiving vessel, said discharge pipe beingprovided with a flared intake, a jet nozzleextending 86 into thecompartment and cooperating with said discharge pipe for elevating thematerial therethrough and means operable from the exterior of thecompartment for adjusting the position of the nozzle with respect to theintake of the discharge pipe.

2. In a sand washing device a receiving vessel, a compartmentcommunicating with the bottom of said vessel into which the materialaccumulated in the bottom of said vessel passes, a discharge pipeopeninginto said compartment and extending upwardly to a point above thelevel of the receiving vessel, said discharge pipe being provided with aflared intake, a jet nozzle extending into the compartment andcooperating with said discharge pipe for elevating the materialtherethrough, means for adjusting the distance between the nozzle andintake, said adjusting means comprising a screw threaded bearing for thenozzle and an extensible connection between the nozzle and its supplypipe.

3. In a sand washing device, a receivi vessel, a compartment arranged inthe bottom of such vesseLcontrollable orificesbetween the compartmentand vessel for permitting the material; accumulated in the bottom of thevessel to enter said compartment, a hydraulic elevator for raising saidmaterial to a point above and outside the receiving vessel and meansoperable from the exterior of the vessel for controlling the size ofsaid orifices. V

4. A sand washing device comprising a tank to receive the material to betreated, a compartment in the bottom of said tank having adjustableorifices in its walls to permit the material accumulated in the bottomof the tank to enter said compartment, a discharge pipe extendingvertically from the interior of the compartment to a point above andbeyond the side of the tank, a Venturi tube forming an intake for saiddischarge nozzle whereby to vary the distance between pipe and a nozzlefor supplying a jet of the nozzle and intake for the discharge pipe.

water to said dischar e pipe for raising material therethrough. D EDMUNDSHAW 5. The combination set forth in claim L Witnesses:

including means accessible from the exterior M. R. HEMLEY,

. of the tank, for adjusting the position of the A. H. SWETT.

